Re: [MW:23925] Bulge P-91 Pipe after PWHT

How we will calculate allowable stress the stress value at the PwhT temperature by using Euler Case

On Wed, Nov 25, 2015 at 11:58 AM, <george.dilintas@gr.bureauveritas.com> wrote:

Why you do not perform a calculation using as allowable stress the stress value at the PwhT temperature? Consider the Euler case which is closer to your configuration

Sent from my BlackBerry 10 smartphone.

From: pradip kumar Sil Sent: Τρίτη, 24 Νοεμβρίου 2015 - 12:42 To: materials-welding Reply To: materials-welding@googlegroups.com Subject: Re: [MW:23914] Bulge P-91 Pipe after PWHT

It is not possible to do PWHT horizontally because spool piece is welded at location

On Tue, Nov 24, 2015 at 3:25 PM, VHEER RAJHU <rajuveera2011@gmail.com> wrote:

Mr shanmugan,

Job is kept in vertical condition where and when the job is heated locally the material softens  at that particular area where all the weight of the job is acted on that softened area which leads to bulging locally

Preferred to do PWHT HORIZONTALLY

On 24 Nov 2015 14:46, "shanmuganathan .subbiah" <shanmuganathan.subbiah@gmail.com> wrote:

Dear 

Both end closed or not during PWHT?

On Tue, Nov 24, 2015 at 12:26 PM, pradip kumar Sil <pradipsil@gmail.com> wrote:

Dear Expert,

In P91 Material ( HRSG header Joint ) after pwht one joint is bulge.We did  Preheating ,Welding , Post Heating,& PWHT in proper way.

Can anybody explain why this bulge occurs & remedy.

During fit-up inspection & weld visual inspection all round the joint is perfect but after PWHT pipe is bulge 140 mm away from the   weld ment

Pic Attached

Regards,

Pradip

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Regards

SHANMUGANATHAN SUBBIAH

AIB- Vincotte International & Partners LLC

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